Car-truck



W. H. H. SISUM.

(N0 Model.)

GAR TRUGK.

No. 321,392. Patented June 30, 1885.

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. UNITED Srrrrns PATENT FFlCE.

CAR-TRUCK.

.JPLIGIPICATION forming part of Letters Patent No. 321,392, dated June30, 1885.

I Application died May 24, 1884. (No model.) 7 v useful Improvement inCar-Trucks, of which the following is a specification.

I will describe a car-truck embodying my improvement, and then point outthe various features in claims.

In the accompanying drawings, Figure 1 is a plan or top view of acar-truck embodying my improvement. Fig. 2 is a side view of the same.Fig. 3 is an'end view thereof. Fig. 4 is a view of certain parts,takcnendwise of the car-truck. Fig. 5 is a section of certain parts, takenlengthwise of the car-truck and Fig. 6 is a sectional side view of amodification.

Similar letters of reference designate corresponding parts in all. thefigures.

A designates wheels secured in the usual or any other suitable manner toaxles B. The ends of the axles B lit in journal-boxes O, which arearranged in slideways in the truckframe, so constructed that thejournal-boxes and axles may move in the direction of the length of theaxles.

The truck-frame consists of two side pieces, D, and transoms E. The sidepieces, D, severally consist of an arch-bar, a, and an invertedarch-bar, b, fastened together at the ends and to columns 0 by bolts (1,and extending one above and the otherbelow columns 6. The columns 0 formthe slideways for the journalboxes 0. A tie-rod, f, also forms part ofeach side piece D, and extends from the lower part of the columns 0under the columns 6. It is secured to the columns a e by bolts,preferably the same bolts which secure the archbars a I) to saidcolumns. All the parts of these side pieces, D, may be made of iron orother suitable material.

The transoms E extend between the columns 8 of the side pieces, D, onebar being arranged near the lower ends and the other bar being arrangednear the upper ends of the said columns. These bars are secured to thecolumns by bolts passing transversely through the columns. Under theupper transom E is a bar, F. Below this is an angle-piece, G. TrussrodsH pass under the anglepiece G, and are secured by nuts working onscrewthreads to shoulders on the transoms E. On the top of the upper'bar is a bearing, 9, for a (ZGDlJePpiD. The transomE and bar F may bemade of wood.

I do'not lay any claim to the construction of the truck-frame'alreadydescribed; nor do I'wish to be confined to the use of my improvement inconnection with such a truckframe, as variations may be made without at.

feeling the improvement.

I designates rockers, which are interposed between'the journal-boxes Cand the parts of the side pieces, D, of the truck-frame, by which theweight of the truck-frame and carbody is transmitted to thejournal-boxes. In

the present instance these rockers are interposed between thejournal-boxes and the in verted arch-bars I). They may be made of iron,steel, or other suitable material. Said rockers are adapted to rock in adirection transversely to the length of the car-body or truck-frame.Each of these rockers I has on the under side a fulcrum-piece, h, whichis approximately of semicircular shape, and fits in a seat, The seat 2'is also approximately semicircular, and in the present instance isformed in the top of a journal-box. Although the seat i is semicircularit forms part of a larger circle than that of which the fulcrunr piece71. forms part, and for this reason a suffioient space is afforded atthe upper end of the seat for the rocking of the fulcrum-piece therein.The upper surface, s, of each rocker is substantially arc-shaped wherethe adjacent inverted arclrbar b rests upon it, and at the ends of thisarc-shaped surface lugs j extend upward on opposite sides of the saidinverted arch-bar b. The sides of the lugs j which are adjacent to theinverted arch-bar b are slightly farther apart than the width of theinverted arch-bar b, and preferably they diverge toward the outer end,in order that the rockers may rock or oscillate. The arc-shaped uppersurfaces of the rockers are of such eccentricity as to result in acam-like action. Such surfaces may, therefore, be justly calledcam-shaped surfaces. On thesides of the rockers arelugs 7a, which fit inrecesses l in the columns 0. These lugs are not quite so wide as therecesses, and their sides are preferably arc-shaped, so as to IOO allowof the rocking or oscillating of the rockers. The arc-shaped uppersurface, s, of each rocker is not concentric with the circle of whichthe fulcrum-piece h forms part, but it forms part of a much largercircle, and is so shaped in a direction transversely to the length ofthe car-body or truck-frame that it is more distant from the fulcrum atthe ends than at the center; hence when the rockers are rocked oroscillated the truck-frame, and consequently the car-body, will beraised, and by gravity will force the rockers back to the centralpositions when the disturbing cause shall have been neutralized.

A surface which would produce the same effect as the arc-shaped surface8, although not strictly an arc-shaped surface, would be in efrender thecar-body more comfortable to the occupants.

In Fig 6 I have shown an equalizer-bar, J used in conjunction with arocker, 0.

It is provided with a pin, m, which enters a cavity in the arc-shapedsurface s of the rocker, but loosely enough to admit of the rockerrocking or oscillating.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. The combination, with axles, of journalboxes inclosing bearingsoperating in conjunction with the axles so as to move with the latter inthe direction of their length, a truckframe provided with slideways inwhich the journal-boxes and axles may move in the direction of thelengths of the axles, and rockers arranged upon the tops of thejournal-boxes and supporting the truck-frame, the rockers havingcamshaped upper surfaces, whereby, when the axles and journal-boxes aremoved laterally relatively to the truck'frame, the truck-frame will beraised, substantially as specified. v

2. The combination, with a car-body or truck-frame, of a slidewayforming part thereof, a journal-box, O, fitting within but unconnectedto the slideway, a rocker arranged between the journal-box and car-bodyor truckframe, and being adapted to rock in a direc tion transversely tothe length of the car-body or truck-frame, and lugs k, extending fromthe rocker and entering recesses Z in the slideway, substantially asspecified.

. WM. H. H. SISUM. Witnesses:

T. G. KEANE, WM. G. LIPsEY,

